Portion of a menstrual cup



FIG. 1 is perspective view of a portion of a menstrual cup;

FIG. 2 is a front view thereof, where a back view is identical;

FIG. 3 is a side view thereof, where a right-side view and left-side view are identical;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the menstrual cup and form no part of the claimed design.

The break lines are illustrative of a variable length and the appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for a portion of a menstrual cup, as shown and described. 